Stream the Grateful Dead concert live at youtube.com/dead50.

The Grateful Dead’s long, strange, 50-year trip, to end with the four surviving members performing two concerts in Santa Clara this weekend and three more in Chicago in early July, has gotten a bit stranger.

When the Chicago concerts were initially announced early this year, Ticketmaster priced tickets from $59.99 to $199.50, but the cost went up fast. Some buyers paid over $10,000 for a single ticket, and sellers asked as much as $100,000 for a three-day passe.

As KRCB Radio’s B.J. Griffith quipped, “For the price of a ticket, I hope Jerry shows up …”

The Grateful Dead’s lead guitartist, singer and songwriter Jerry Garica, died in 1995 of a heart attack.

The farewell reunion concerts will feature bassist and singer Phil Lesh, guitarist and singer Bob Weir and drummers Mickey Hart, who lives in Occidental, and Bill Kreutzman.

When two more concerts were added, at 7 p.m. Saturday (June 27) and 6 p.m. Sunday (June 28) at Levi Stadium in Santa Clara, concert industry watchers expected similar price spikes, but this past week tickets were available for as little as $15.

Whether the lower prices are mostly because the high prices scared some fans off, or partly because remaining tickets are remnants located farther from the stage, the current situation seems truer to the spirit of the band, which performed free in Bay Area parks in the ’60s.

Some fans are opting for live streams of the concerts, rather than trekking down to take seats in the stratosphere of the stadium’s back rows.

As drummer John Morrison, who serves on the board of directors of the Sonoma County Blues Society, put it: “I’m older and lazier, but I love the Dead, since 1967. The Dead were a community institution, a way of living and playing music.”

For information, news and updates: http://dead-50.net/

Classical Benefits

What: Santa Rosa Symphony, with Music Director Bruno Ferrandis, Conductor Laureate Jeffrey Kahane and Conductor Emeritus

When: 7:30 p.m. Nov. 20

Where: Weill Hall at Green Music Center on the Sonoma State University campus in Rohnert Park

Admission: Free

Tickets: 707-546-8742 or srsymphony.org

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What: San Francisco Symphony presents Symphony Relief: A Benefit Concert for the North Bay, with Music Director Michael Tilson Thomas, the San Francisco Symphony Chorus and guests artists

When: 7:30 p.m. Nov. 19

Where: Davies Symphony Hall, 201 Van Ness Avenue, San Francisco

Admission: $25-$50.

Tickets: 415-864-6000 or sfsymphony.org